sea-floor spreading - is the process of expanding the ocean floor
sonar - a device that bounces sound waves under-water object
mid-ocean ridge - the longest chain of mountain covered with water
deep-ocean trenches - deep ocean trenches forms when the oceanic crust is bent downward
subduction - the process by which the ocean floor sinks beneath a deep ocean trench
outline
Introduction
East Pacific Rise
you can find giant, red-tipped tube worms
mid ocean ridge
hot water vents
evidence for the sea-floor spreading
Mapping the Mid-Ocean Ridge
East Pacific Rise is one part of the mid-ocean ridge
mid-1900's, scientists mapped the mid-ocean ridge using sonar
Evidence for the Sea-floor spreading
evidence from molten material
evidence from magnetic strips
evidence from drilling sample
Subduction at deep ocean trenches
convection currents push new crust to deep-ocean trenches
Table of Contents
Notes1.4
sea-floor spreading - is the process of expanding the ocean floor
sonar - a device that bounces sound waves under-water object
mid-ocean ridge - the longest chain of mountain covered with water
deep-ocean trenches - deep ocean trenches forms when the oceanic crust is bent downward
subduction - the process by which the ocean floor sinks beneath a deep ocean trench
outline
Introduction
Mapping the Mid-Ocean Ridge
Evidence for the Sea-floor spreading
Subduction at deep ocean trenches
Subduction and Earth's Oceans